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path: root/drivers/pci/dmar.c
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Diffstat (limited to 'drivers/pci/dmar.c')
-rw-r--r--drivers/pci/dmar.c46
1 files changed, 28 insertions, 18 deletions
diff --git a/drivers/pci/dmar.c b/drivers/pci/dmar.c
index 691b3ad..f5a662a 100644
--- a/drivers/pci/dmar.c
+++ b/drivers/pci/dmar.c
@@ -191,26 +191,17 @@ dmar_parse_one_drhd(struct acpi_dmar_header *header)
static int __init dmar_parse_dev(struct dmar_drhd_unit *dmaru)
{
struct acpi_dmar_hardware_unit *drhd;
- static int include_all;
int ret = 0;
drhd = (struct acpi_dmar_hardware_unit *) dmaru->hdr;
- if (!dmaru->include_all)
- ret = dmar_parse_dev_scope((void *)(drhd + 1),
+ if (dmaru->include_all)
+ return 0;
+
+ ret = dmar_parse_dev_scope((void *)(drhd + 1),
((void *)drhd) + drhd->header.length,
&dmaru->devices_cnt, &dmaru->devices,
drhd->segment);
- else {
- /* Only allow one INCLUDE_ALL */
- if (include_all) {
- printk(KERN_WARNING PREFIX "Only one INCLUDE_ALL "
- "device scope is allowed\n");
- ret = -EINVAL;
- }
- include_all = 1;
- }
-
if (ret) {
list_del(&dmaru->list);
kfree(dmaru);
@@ -384,12 +375,21 @@ int dmar_pci_device_match(struct pci_dev *devices[], int cnt,
struct dmar_drhd_unit *
dmar_find_matched_drhd_unit(struct pci_dev *dev)
{
- struct dmar_drhd_unit *drhd = NULL;
+ struct dmar_drhd_unit *dmaru = NULL;
+ struct acpi_dmar_hardware_unit *drhd;
- list_for_each_entry(drhd, &dmar_drhd_units, list) {
- if (drhd->include_all || dmar_pci_device_match(drhd->devices,
- drhd->devices_cnt, dev))
- return drhd;
+ list_for_each_entry(dmaru, &dmar_drhd_units, list) {
+ drhd = container_of(dmaru->hdr,
+ struct acpi_dmar_hardware_unit,
+ header);
+
+ if (dmaru->include_all &&
+ drhd->segment == pci_domain_nr(dev->bus))
+ return dmaru;
+
+ if (dmar_pci_device_match(dmaru->devices,
+ dmaru->devices_cnt, dev))
+ return dmaru;
}
return NULL;
@@ -491,6 +491,7 @@ int alloc_iommu(struct dmar_drhd_unit *drhd)
int map_size;
u32 ver;
static int iommu_allocated = 0;
+ int agaw;
iommu = kzalloc(sizeof(*iommu), GFP_KERNEL);
if (!iommu)
@@ -506,6 +507,15 @@ int alloc_iommu(struct dmar_drhd_unit *drhd)
iommu->cap = dmar_readq(iommu->reg + DMAR_CAP_REG);
iommu->ecap = dmar_readq(iommu->reg + DMAR_ECAP_REG);
+ agaw = iommu_calculate_agaw(iommu);
+ if (agaw < 0) {
+ printk(KERN_ERR
+ "Cannot get a valid agaw for iommu (seq_id = %d)\n",
+ iommu->seq_id);
+ goto error;
+ }
+ iommu->agaw = agaw;
+
/* the registers might be more than one page */
map_size = max_t(int, ecap_max_iotlb_offset(iommu->ecap),
cap_max_fault_reg_offset(iommu->cap));
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